8465665649 has 4 divisors (see below), whose sum is σ = 9675046464. Its totient is φ = 7256284836.

The previous prime is 8465665619. The next prime is 8465665667. The reversal of 8465665649 is 9465665648.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8465665649 - 2⁸ = 8465665393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8465665619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 604690397 + ... + 604690410.

It is an arithmetic number, because the mean of its divisors is an integer number (2418761616).

Almost surely, 2^8465665649 is an apocalyptic number.

It is an amenable number.

8465665649 is a deficient number, since it is larger than the sum of its proper divisors (1209380815).

8465665649 is a wasteful number, since it uses less digits than its factorization.

8465665649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209380814.

The product of its digits is 37324800, while the sum is 59.

The square root of 8465665649 is about 92009.0519948988. The cubic root of 8465665649 is about 2038.0759804557.

Subtracting 8465665649 from its reverse (9465665648), we obtain a palindrome (999999999).

The spelling of 8465665649 in words is "eight billion, four hundred sixty-five million, six hundred sixty-five thousand, six hundred forty-nine".